If you add a data grid that’s currently showing a list of Speakers, you can create an Xpath query that will return Speakers where particular attributes (like “email” or “last name”) like this:
[email = empty or lastName = empty]
I hope this helps!
Basically you can add a calculated Boolean attribute e.g. _Uncompleted to your entity. The called microflow behind this attribute can return a Boolean value calculated like this:
$Speaker/attr1 = empty or $Speaker/attr2 = empty
But, you cannot use a calculated field in a Xpath. Alternatively, you can retrieve all bookings and filter this list with a list operation (filter _Uncompleted equals true)
A calculated field is bad for performance. Instead of this you can store the Boolean field and then you need to manage this field “manually”: during the create/update of the object or with a before commit event.